loudspeaker

Abstract

The present invention provides a loudspeaker, comprising a frame having an accommodating space, a vibration system accommodated in the frame, and a magnetic circuit system for driving the vibration system to vibrate, wherein the vibration system comprises a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound; the diaphragm comprises a dome located in the middle; the dome comprises a planar portion perpendicular to a vibration direction and side portions extending from the edges of the planar portion towards the magnetic circuit system; the frame comprises a main body portion having an annular structure and protruding portions extending from the main body portion in the vibration direction and away from the diaphragm; the loudspeaker further comprises FPC boards electrically connected to the voice coil; and each FPC board comprises a first fixing portion fixed to the corresponding protruding portion, a second fixing portion connected to the corresponding side portion, and an elastic arm connecting the first fixing portion and the second fixing portion. In the present invention, the elastic arms are spaced apart from the main body portion of the frame in the vibration direction, effectively avoiding the problem in the prior art that the magnetic circuit system has a reduced size due to occupation of less space, thereby improving the acoustic performance of the loudspeaker.

Description

speaker Technical Field

[0001] This invention relates to the field of electroacoustic conversion, and more particularly to a loudspeaker. Background Technology

[0002] A loudspeaker is an electroacoustic transducer that converts electrical signals into sound signals and radiates them into the air. Loudspeakers play an indispensable role in audio devices. A loudspeaker typically consists of a magnetic circuit system, a resonant system, a frame, and an FPC board. The voice coil of the resonant system, when energized, generates an induced magnetic field that interacts with the magnetic field of the magnetic circuit system, producing an upward or downward force. This force drives the diaphragm of the resonant system to vibrate, pushing the air to produce sound. Currently, consumers' demands for sound quality are increasing, and correspondingly, designers are placing higher performance requirements on loudspeakers.

[0003] In the prior art, the voice coil of the loudspeaker is mainly connected to the external circuit through the FPC board. However, since the pads connecting the FPC board to the external circuit are fixed on the frame, the elastic arm of the FPC board needs to be set in the receiving space of the frame by bending and extending perpendicular to the vibration direction. This reduces the space occupied by the magnetic circuit system, which in turn affects the acoustic performance of the loudspeaker. Technical issues

[0004] The present invention aims to provide a loudspeaker comprising a frame having a receiving space, a vibration system housed within the frame, and a magnetic circuit system for driving the vibration system to vibrate. The magnetic circuit system includes a yoke fixed to the frame, a main magnet fixed to the yoke, and auxiliary magnets spaced apart from the main magnet. The vibration system includes a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound. The diaphragm includes a dome located at a central position and folded rings spaced around the dome. The dome includes a planar portion perpendicular to the vibration direction and a side portion extending from the edge of the planar portion toward the magnetic circuit system. The frame includes a main body with an annular structure and a side portion extending from the main body along the vibration direction. The loudspeaker also includes an FPC board electrically connected to the voice coil, the FPC board including a first fixing part fixed to the protrusion, a second fixing part connected to the side part, and a spring arm connecting the first fixing part and the second fixing part, the spring arm being spaced apart from the main body part along the vibration direction, the FPC board including a first FPC board and a second FPC board disposed on opposite sides of the auxiliary magnet, the first FPC board including a bent part conforming to the surface of the planar part and facing the voice coil and a vertical part connecting the second fixing part and the bent part, the bent part including a solder pad electrically connected to the voice coil. Technical solutions

[0005] Preferably, the basin stand is rectangular, the main body includes two oppositely arranged long axis sides and two short axis sides connecting the long axis sides, and the protrusion extends from the edge of the short axis side and is integrally formed.

[0006] Preferably, the auxiliary magnet includes a first auxiliary magnet disposed on opposite sides of the main magnet along its long axis. The first auxiliary magnet includes a side surface parallel to the vibration direction and away from the main magnet, and the elastic arm is parallel to the side surface.

[0007] Preferably, the auxiliary magnet further includes a second auxiliary magnet disposed on opposite sides of the main magnet along the short axis direction, the adjacent first auxiliary magnet and the second auxiliary magnet are connected to each other, and the connection between the first auxiliary magnet and the second auxiliary magnet is at a right angle.

[0008] Preferably, the first FPC board further includes an electrical connection extending from the first fixing portion and away from the frame, the electrical connection being used to connect the voice coil to an external circuit.

[0009] Preferably, the vertical portion and the voice coil are spaced apart along a direction perpendicular to the vibration direction.

[0010] Preferably, the elastic arm includes a first elastic arm connected to the first fixing part, a second elastic arm connected to the second fixing part, and an arc-shaped part connecting the first elastic arm and the second elastic arm, wherein the first elastic arm and the second elastic arm are parallel to each other.

[0011] Preferably, the auxiliary magnet includes a recessed clearance portion extending from the side surface toward the main magnet, and the second fixing portion and the clearance portion are disposed opposite to each other along the vibration direction. Beneficial effects

[0012] Compared with related technologies, the loudspeaker provided by the present invention includes a frame with a receiving space. The frame includes a main body with an annular structure and a protrusion extending from the main body along the vibration direction and away from the diaphragm. The loudspeaker also includes an FPC board electrically connected to a voice coil. The FPC board includes a first fixing part fixed to the protrusion, a second fixing part connected to the diaphragm, and a spring arm connecting the first fixing part and the second fixing part. The spring arm is spaced apart from the main body along the vibration direction, which effectively reduces the space occupied by the FPC board in the frame, thereby increasing the volume of the magnetic circuit system and improving the acoustic performance of the loudspeaker. Attached Figure Description

[0013] Figure 1 is a three-dimensional structural diagram of a loudspeaker according to an embodiment of the present invention;

[0014] Figure 2 is an exploded view of the speaker in Figure 1;

[0015] Figure 3 is a cross-sectional view along line AA in Figure 1;

[0016] Figure 4 is a schematic diagram of the combined structure of the FPC board, diaphragm, frame and voice coil in the loudspeaker in Figure 1;

[0017] Figure 5 is a schematic diagram of the enlarged structure of part B in Figure 4;

[0018] Figure 6 is a schematic diagram of the combined structure of the FPC board and the frame in the speaker in Figure 1;

[0019] Figure 7 is a schematic diagram of the combined structure of Figure 1 with the speaker's magnetic yoke removed. Embodiments of the present invention

[0020] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention, primarily used to illustrate the embodiments and to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Referring to Figures 1 and 2, an embodiment of the present invention provides a loudspeaker 100, which includes a frame 10 with a receiving space, a vibration system 20 housed in the frame 10, a magnetic circuit system 30 for driving the vibration system 20 to vibrate, and an FPC board 40 for electrically connecting the loudspeaker 100 and external circuitry. The magnetic circuit system 30 and the vibration system 20 are fixed to the frame 10, and the frame 10 provides support for the magnetic circuit system 30 and the vibration system 20.

[0023] Please refer to Figures 1, 2, and 3. The vibration system 20 includes a diaphragm 22 fixed to the frame 10 and a voice coil 23 that drives the diaphragm 22 to vibrate and produce sound. An electrical signal is introduced to the voice coil 23 through the FPC board 40. When the loudspeaker 100 is powered on, the voice coil 23 vibrates under the action of the magnetic circuit system 30, thereby driving the diaphragm 22 to vibrate and produce sound.

[0024] Referring to Figures 2 and 3, the magnetic circuit system 30 includes a magnetic yoke 31 fixed to the frame 10, and a main magnet 32 ​​and a secondary magnet 33 fixed to the side of the magnetic yoke 31 near the vibrating system 20. The secondary magnets 33 are arranged around the main magnet 32 ​​at intervals. The secondary magnets 33 and the main magnets 32 together form a magnetic gap 301, in which the voice coil 23 is suspended. The magnetic circuit system 30 also includes a main pole core 34 located above the main magnet 32 ​​and a secondary pole core 35 located above the secondary magnet 33. The secondary pole core 35 is fixed to the frame 10 to support the magnetic circuit system on the frame 10.

[0025] Please refer to Figures 2 and 4. The diaphragm 22 includes a dome 221 located in the middle and folded rings 222 spaced around the dome 221. The dome 221 includes a planar portion 2211 perpendicular to the vibration direction and a side portion 2212 extending from the edge of the planar portion 2211 toward the magnetic circuit system 30.

[0026] Please refer to Figures 4, 5, and 6. The basin frame 10 includes a ring-shaped main body 11 and a protrusion 12 extending from the main body 11 along the vibration direction and away from the diaphragm 22. The basin frame 10 is rectangular. The main body 11 includes two opposing long axis sides 111 and two short axis sides 112 connecting the long axis sides 111. The protrusion 12 extends from the edge of the short axis sides 112 and is integrally formed. The FPC plate 40 includes a first FPC plate 41 and a second FPC plate 42 disposed on opposite sides of the auxiliary magnet 33 along the long axis direction. The first FPC plate 41 and the second FPC plate 42 include a first fixing part 401 fixed to the protrusion 12, a second fixing part 402 connected to the side part 2212, and a spring arm 403 connecting the first fixing part 401 and the second fixing part 402. However, in this invention, the first FPC board 41 is provided with an electrical connection portion 404 extending from the first fixing portion 401 and away from the frame 10. The electrical connection portion 404 is used to connect the voice coil 23 to an external circuit. At the same time, the elastic arm 403 of the FPC board 40 and the main body portion 11 of the frame 10 are arranged at intervals relative to each other along the vibration direction. Compared with the prior art, where the elastic arm needs to extend into the receiving space of the frame, this effectively reduces the receiving space occupied by the FPC board 40 in the frame 10, thereby increasing the volume of the magnetic circuit system 30 and improving the acoustic performance of the loudspeaker 100.

[0027] Please refer to Figures 4 and 5. The elastic arm 403 includes a first elastic arm 4031 connected to the first fixing part 401, a second elastic arm 4032 connected to the second fixing part 402, and an arc-shaped part 4033 connecting the first elastic arm 4031 and the second elastic arm 4032. The first elastic arm 4031 and the second elastic arm 4032 are parallel to each other. In addition, the first FPC board 41 also includes a bent part 414 that conforms to the planar part 2211 and faces the surface of the voice coil 23, and a vertical part 415 that connects the second fixing part 402 and the bent part 414. The vertical part 415 and the voice coil 23 are spaced apart perpendicular to the vibration direction. The bent part 414 includes a solder pad 416 that is electrically connected to the voice coil 23.

[0028] Please refer to Figures 2 and 7. The auxiliary magnet 33 includes a first auxiliary magnet 331 disposed on opposite sides of the main magnet 32 ​​along its long axis. The first auxiliary magnet 331 includes a side surface 3311 parallel to the vibration direction and away from the main magnet 32. Specifically, the elastic arm 403 is parallel to the side surface 3311. The auxiliary magnet 33 includes a relief portion 333 recessed from the side surface 3311 and toward the main magnet 32. The second fixing portion 402 of the FPC plate 40 and the relief portion 333 are disposed opposite each other in the vibration direction to prevent the FPC plate 40 from colliding with the main magnet 32 ​​during vibration. At the same time, the auxiliary magnet 33 also includes a second auxiliary magnet 332 disposed on opposite sides of the main magnet 32 ​​along its short axis. Adjacent first auxiliary magnets 331 and second auxiliary magnets 332 are connected to each other. The connection between the first auxiliary magnets 331 and second auxiliary magnets 332 is at a right angle, effectively increasing the volume of the auxiliary magnet 33 and thereby improving the magnetic conductivity of the magnetic circuit system 30.

[0029] Compared with the prior art where the solder pads of the speaker's FPC board are fixed to the frame, causing the elastic arm to need to be bent and extended into the frame's receiving space, the elastic arm 403 of the speaker 100 of the present invention is arranged relatively spaced from the main body 11 of the frame 10 along the vibration direction, which effectively increases the volume of the magnetic circuit system 30 in the receiving space of the frame 10, thereby improving the acoustic performance of the speaker 100.

[0030] The above description is merely an embodiment of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A loudspeaker comprising a frame having a receiving space, a vibration system housed in the frame, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system comprising a yoke fixed to the frame, a main magnet fixed to the yoke, and auxiliary magnets spaced apart from the main magnet; the vibration system comprising a diaphragm fixed to the frame and a voice coil for driving the diaphragm to vibrate and produce sound; the diaphragm comprising a dome located at a central position and folded rings spaced around the dome; the dome comprising a planar portion perpendicular to the vibration direction and a side portion extending from the edge of the planar portion toward the magnetic circuit system; the frame comprising a ring-shaped main body and a protrusion extending from the main body along the vibration direction and away from the diaphragm; characterized in that... The loudspeaker also includes an FPC board electrically connected to the voice coil. The FPC board includes a first fixing part fixed to the protrusion, a second fixing part connected to the side part, and a spring arm connecting the first fixing part and the second fixing part. The spring arm is spaced apart from the main body part along the vibration direction. The FPC board includes a first FPC board and a second FPC board disposed on opposite sides of the auxiliary magnet. The first FPC board also includes a bent part that conforms to the surface of the planar part and faces the voice coil, and a vertical part that connects the second fixing part and the bent part. The bent part includes a solder pad electrically connected to the voice coil.

2. The loudspeaker according to claim 1, characterized in that, The basin stand is rectangular, and the main body includes two oppositely arranged long axis sides and two short axis sides connecting the long axis sides. The protrusion extends from the edge of the short axis side and is integrally formed.

3. The loudspeaker according to claim 1, characterized in that, The auxiliary magnet includes a first auxiliary magnet disposed on opposite sides of the main magnet along its long axis. The first auxiliary magnet includes a side surface parallel to the vibration direction and away from the main magnet, and the elastic arm is parallel to the side surface.

4. The loudspeaker according to claim 3, characterized in that, The auxiliary magnet also includes a second auxiliary magnet disposed on opposite sides of the main magnet along its short axis. The adjacent first auxiliary magnet and the second auxiliary magnet are connected to each other, and the connection between the first auxiliary magnet and the second auxiliary magnet is at a right angle.

5. The loudspeaker according to claim 1, characterized in that, The first FPC board also includes an electrical connection extending from the first fixing portion and away from the frame, the electrical connection being used to connect the voice coil to an external circuit.

6. The loudspeaker according to claim 1, characterized in that, The vertical section and the voice coil are spaced apart along a direction perpendicular to the vibration direction.

7. The loudspeaker according to claim 1, characterized in that, The elastic arm includes a first elastic arm connected to the first fixing part, a second elastic arm connected to the second fixing part, and an arc-shaped part connecting the first elastic arm and the second elastic arm, wherein the first elastic arm and the second elastic arm are parallel to each other.

8. The loudspeaker according to claim 3, characterized in that, The auxiliary magnet includes a recessed clearance portion extending from the side surface toward the main magnet, and the second fixing portion and the clearance portion are arranged opposite to each other along the vibration direction.

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